F11 Lecture 6 - 310 - Anatomy cont_d

F11 Lecture 6 - 310 - Anatomy cont_d - Brain Anatomy contd...

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Brain Anatomy cont’d 6 – September 21, 2011
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Structure of the Vertebrate Nervous System The Hindbrain consists of the: Medulla. Pons. Cerebellum. Located at the posterior portion of the brain
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Metencephalon Pons Origin of neuronal activity that serves to increase arousal and readiness of other parts of the brain along with the medulla, contains the reticular formation and raphe system.
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Metencephalon The Cerebellum : a structure located in the hindbrain with many deep regular folds. 3 functional parts: 1. Flocculonodular lobe – vestibulocerebellum helps regulate balance & eye movements 2. Spinocerebellum helps regulate body and limb movements 3. Cerebrocerebellum helps in planning movements and evaluating sensory information for action, and has some purely cognitive functions (e.g. important for shifting attention between auditory and visual stimuli.) http://en.wikipedia.org/wiki/File:CerebellumDiv.png
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Mesencephalon The midbrain is contains the following structures: Tectum – roof of the midbrain Superior colliculus &inferior colliculus – swellings on each side of the tectum and routes for sensory information Tegmentum - the intermediate level of the midbrain Substantia nigra - gives rise to the dopamine-containing pathway
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Reticular formation The reticular formation (RF) : a diffusely arranged network of neurons that extends from the mesencephalon (midbrain), through the metencephalon (where it is most concentrated) to the myelencephalon descending portion is one of several brain areas that control
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F11 Lecture 6 - 310 - Anatomy cont_d - Brain Anatomy contd...

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